First I want to thank you for the help and I am somewhat new at C# so forgive me if I have something listed wrong. This is what I got:

I am working on a school project designing a car dealership website. I have an inventory list that allows you to edit any car in the inventory. When you click on the edit button it takes you to the edit page and populates the controls with selections from the database. I have an options table that stores the VehicleID and Option ID. When the page loads it fills all the DropDownLists for the vehicle info with the data and selects the correct item according to the database selection but the CheckBoxList does not select the items that are on the Options table. I checked the query in SSMS and it returns the correct data. I have stepped through the method and it works till the “(currentCheckBox != null) if statement. It doesn’t throw any errors but it also doesn’t select items when the page renders.

I thought it might have been something with the page life cycle since databound controls don’t render until the end but the DropDown’s I have fill and selects the correct item according to the database.

Can anyone shed some light?? Thanks again

protected void Page_Load(object sender, EventArgs e)
        //R Check to see if the page is PostBack
        if (IsPostBack == false)
            lblCurrVehicleID.Text = Request.QueryString["ID"].ToString();

            //capture the customer ID from the query string for edit
            int VehicleID = int.Parse(Request.QueryString["ID"]);


    protected void LoadVehicleOptions(int ID)
        //Get vehicle ID
        int VehicleID = ID;

        //Declare the connection object
        SqlConnection Conn = new SqlConnection(ConfigurationManager.ConnectionStrings["DealershipData"].ConnectionString);

        //Define you query
        string sql = "SELECT * FROM VehicleOptions WHERE InventoryID=@VehicleID";

        //Declare the Command
        SqlCommand cmd = new SqlCommand(sql, Conn);

            //Make the connection 

            //Add the parameters needed for the SQL query
            cmd.Parameters.AddWithValue("@VehicleID", VehicleID);

            //Declare the DataReader
            SqlDataReader dr = null;

            //Fill the DataReader
            dr = cmd.ExecuteReader();

            //Get the data
            if (dr.Read() == false)
                //No Records
                lblOptError.Text = "No record found";

            //CheckBoxList chkbx = (CheckBoxList)Form.FindControl("cblOptions");

            while (dr.Read())
                //ListItem currentCheckBox = chkbx.Items.FindByValue(dr["OptionID"].ToString());
                ListItem currentCheckBox = default(ListItem);
                currentCheckBox = cblOptions.Items.FindByValue(dr["OptionID"].ToString());
                if (currentCheckBox != null) Problem happens here                {
                    currentCheckBox.Selected = true;
            //Close the data reader and database connection

        catch (Exception ex)
            lblOptError.Text = ex.Message;

6 Years
Discussion Span
Last Post by pdoyle1521

add this code before your while loop and remove the checking

Thank you for the help but it didn't seem to work. I am getting a catch error now, "Object reference not set to an instance of an object." Is that because it is references the CheckBoxList before its loaded dynamically??

Thanks again for your help

This topic has been dead for over six months. Start a new discussion instead.
Have something to contribute to this discussion? Please be thoughtful, detailed and courteous, and be sure to adhere to our posting rules.